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Provide euidaccess, canonicalize_file_name; fix fchmodat.

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* syscalls.cc (fchmodat): lchmod is not yet implemented.
(euidaccess): New function.
* path.cc (realpath): Update comment.
(canonicalize_file_name): New function.
* include/cygwin/stdlib.h (canonicalize_file_name): Declare it.
* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
* cygwin.din: Export canonicalize_file_name, eaccess, euidaccess.
* posix.sgml: Mention them.
This commit is contained in:
Eric Blake
2009-09-25 23:55:00 +00:00
parent 358d4e3cb0
commit 2bf78f0928
7 changed files with 65 additions and 12 deletions
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30
winsup/cygwin/syscalls.cc
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@@ -1580,6 +1580,29 @@ access (const char *fn, int flags)
return res;
}
/* Linux provides this extension; it is basically a wrapper around the
POSIX:2008 faccessat (AT_FDCWD, fn, flags, AT_EACCESS). We also
provide eaccess as an alias for this, in cygwin.din. */
extern "C" int
euidaccess (const char *fn, int flags)
{
// flags were incorrectly specified
int res = -1;
if (flags & ~(F_OK|R_OK|W_OK|X_OK))
set_errno (EINVAL);
else
{
fhandler_base *fh = build_fh_name (fn, NULL, PC_SYM_FOLLOW, stat_suffixes);
if (fh)
{
res = fh->fhaccess (flags, true);
delete fh;
}
}
debug_printf ("returning %d", res);
return res;
}
static void
rename_append_suffix (path_conv &pc, const char *path, size_t len,
const char *suffix)
@@ -3878,9 +3901,12 @@ fchmodat (int dirfd, const char *pathname, mode_t mode, int flags)
myfault efault;
if (efault.faulted (EFAULT))
return -1;
if (flags & ~AT_SYMLINK_NOFOLLOW)
if (flags)
{
set_errno (EINVAL);
/* BSD has lchmod, but Linux does not. POSIX says
AT_SYMLINK_NOFOLLOW is allowed to fail on symlinks; but Linux
blindly fails even for non-symlinks. */
set_errno ((flags & ~AT_SYMLINK_NOFOLLOW) ? EINVAL : EOPNOTSUPP);
return -1;
}
char *path = tp.c_get ();